CN219678682U

CN219678682U - Vibration sounding device and sounding system

Info

Publication number: CN219678682U
Application number: CN202320518634.0U
Authority: CN
Inventors: 顾善勇; 赵洪强
Original assignee: KING TONE INNOVATION
Current assignee: KING TONE INNOVATION
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2023-09-12
Anticipated expiration: 2033-03-10

Abstract

The utility model provides a vibration sounding device and a sounding system, wherein the vibration sounding device comprises a coil, a magnetic circuit system and two elastic sheets, wherein the magnetic circuit system part and the coil interact with each other due to a magnetic field generated by a changed current, so that vibration is generated, and the two elastic sheets are respectively arranged at two ends of the magnetic circuit system to control the vibration amplitude of the two elastic sheets. Specifically, the elastic sheet is provided with an asymmetrically arranged hollow structure, so that strong resonance caused by modal degeneracy in the vibration process is effectively avoided, and the low-frequency performance of the vibration sounding device is improved. In addition, the elastic sheet with the asymmetric hollow structure can effectively inhibit the vibration amplitude of each mode, reduce fluctuation on a frequency response curve caused by anti-phase vibration, obtain flatter frequency response and high-frequency bandwidth, and improve the middle-high frequency performance of the vibration sounding device.

Description

Vibration sounding device and sounding system

Technical Field

The utility model relates to the technical field of electroacoustic equipment, in particular to a vibration sounding device and a sounding system.

Background

With the popularization of the internet and mobile communication, electronic consumer products such as mobile phones, tablet computers, notebook computers, televisions and the like are commonly used in daily offices, production and life. These products have in recent years been designed with larger screens and reduced thickness, with limited space to accommodate thinner and smaller speaker modules. The smaller speaker modules make the audio playback bandwidth of the overall device much worse than conventional audio-like products, especially with insufficient low frequency performance.

Disclosure of Invention

Therefore, the utility model aims to provide a vibration sounding device and a sounding system, wherein the vibration sounding device effectively separates the intrinsic vibration of a low frequency band of the vibration sounding device from other vibration modes by arranging an elastic sheet with an asymmetric hollow structure, so that strong resonance caused by mode degeneracy is avoided, and the low frequency performance of the whole structure is improved.

In a first aspect, an embodiment of the present utility model provides a vibration sound emitting device, including:

the coil is arranged inside the vibration sounding device;

the magnetic circuit system comprises a magnetic structure arranged on the inner side of the coil and a magnetic conduction structure wrapping the coil and the magnetic structure, and supporting parts are arranged on two sides, close to the opening of the coil, of the magnetic conduction structure;

the two elastic sheets are respectively arranged at two ends of the coil opening, each elastic sheet comprises a first connecting portion, a second connecting portion and an elastic portion, the first connecting portion is in butt joint with the supporting portion, the second connecting portion is sleeved on the outer side of the first connecting portion, the elastic portion is arranged between the first connecting portion and the second connecting portion, and the elastic portion is of an asymmetrically arranged hollow structure.

Further, the elastic part comprises a plurality of elastic pieces respectively connected with the first connecting part and the second connecting part, and the elastic pieces are provided with at least one bending structure.

Further, the cross-sectional areas of the first section of the elastic member connected to the first connecting portion and the second section connected to the second connecting portion are not equal.

Further, the shrapnel comprises at least two layers of metal materials and at least one layer of polymer material, and the outermost layers of the shrapnel are all made of the metal materials.

Further, the vibration sound generating apparatus includes:

the two coils are arranged at intervals, and the extraction electrodes of the two coils are mutually independent;

the two circuit boards are respectively arranged between the two coils and are connected with the extraction electrodes of the two coils in a one-to-one correspondence manner.

Further, the magnetic conduction structure further comprises a cylindrical outer magnetic conduction frame arranged around the outer side of the coil, the outer magnetic conduction frame comprises an outer frame wrapping the outer side of the coil and a supporting end convexly arranged between the two coils, the outer frame is provided with a positioning opening for positioning the circuit board, and the positioning opening is arranged on one side of the outer frame close to the supporting end.

Further, the outer frame comprises a first frame and a second frame, the first frame and/or the second frame is/are provided with a step structure which forms the positioning opening near the supporting end, and the first frame and the second frame are connected through a connecting structure which is matched with each other.

Further, the magnetic conduction structure comprises an inner magnetic conduction frame and a magnetic conduction plate, the magnetic conduction plate is matched with the inner magnetic conduction frame to wrap the magnetic structure and the coil, and one side, far away from the coil, of the inner magnetic conduction frame is provided with at least one balancing weight.

Further, the vibration sounding device further comprises a buffer structure arranged on one side of the balancing weight.

In a second aspect, an embodiment of the present utility model further provides a sound generating system, including:

the vibration sound-producing device of the first aspect;

and the vibration guide sheet is respectively connected with the vibration sounding device and the object to be excited.

The embodiment of the utility model provides a vibration sounding device and a sounding system, wherein the vibration sounding device comprises a coil, a magnetic circuit system and two elastic sheets, wherein the magnetic circuit system part and the coil interact with each other due to a magnetic field generated by a changed current, so that vibration is generated, and the two elastic sheets are respectively arranged at two ends of the magnetic circuit system to control the vibration amplitude of the two elastic sheets. Specifically, the elastic sheet is provided with an asymmetrically arranged hollow structure, so that strong resonance caused by modal degeneracy in the vibration process is effectively avoided, and the low-frequency performance of the vibration sounding device is improved. In addition, the elastic sheet with the asymmetric hollow structure can effectively inhibit the vibration amplitude of each mode, reduce fluctuation on a frequency response curve caused by anti-phase vibration, obtain flatter frequency response and high-frequency bandwidth, and improve the middle-high frequency performance of the vibration sounding device.

Drawings

The above and other objects, features and advantages of the present utility model will become more apparent from the following description of embodiments of the present utility model with reference to the accompanying drawings, in which:

FIG. 1 is an exploded schematic view of a vibratory sound device provided by an embodiment of the present utility model;

FIG. 2 is a schematic diagram illustrating displacement of a spring in a working state of a sound generating system according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of a sound generating system according to an embodiment of the present utility model;

FIG. 4 is a top view of a spring plate according to a first embodiment of the present utility model;

fig. 5 is a top view of a spring plate according to a second embodiment of the present utility model;

fig. 6 is a top view of a spring plate according to a third embodiment of the present utility model;

FIG. 7 is a cross-sectional view of a vibratory sound device provided by an embodiment of the present utility model;

fig. 8 is a cross-sectional view of an outer magnetically permeable frame provided with coils according to an embodiment of the present utility model;

fig. 9 is a top view of an outer magnetically permeable frame provided by an embodiment of the present utility model;

fig. 10 is a schematic perspective view of a first frame according to an embodiment of the present utility model;

FIG. 11 is a schematic perspective view of a second frame according to an embodiment of the present utility model;

fig. 12 is a top view of an outer magnetic conductive frame and a circuit board according to an embodiment of the present utility model;

Fig. 13 is a top view of a circuit board according to an embodiment of the present utility model;

fig. 14 is a top view of a circuit board and a coil according to an embodiment of the present utility model;

fig. 15 is a cross-sectional view of a magnetic circuit system according to a first embodiment of the present utility model;

fig. 16 is a cross-sectional view of a magnetic circuit system according to a second embodiment of the present utility model;

fig. 17 is a cross-sectional view of a magnetic circuit system provided in a third embodiment of the present utility model;

FIG. 18 is a top view of a vibration-guiding plate according to an embodiment of the present utility model;

FIG. 19 is a side view of a sound emitting system provided in accordance with a first embodiment of the present utility model;

FIG. 20 is a side view of a sound emitting system according to a second embodiment of the present utility model;

FIG. 21 is a side view of a sound emitting system provided in accordance with a third embodiment of the present utility model;

FIG. 22 is a side view of a sound emitting system provided in accordance with a fourth embodiment of the present utility model;

FIG. 23 is a schematic diagram of a sound emitting system provided by an embodiment of the present utility model;

FIG. 24 is a schematic diagram of a first application of a sound production system provided by an embodiment of the present utility model;

fig. 25 is a schematic diagram of a second application of the sound generating system according to the embodiment of the present utility model.

Reference numerals illustrate:

1-coil;

2-a magnetic circuit system; 21-magnetic structure; 21 a-a central magnetic structure; 21 b-ring magnetic structure; 22-magnetic conduction structure; 23-a support;

3-shrapnel; 31-a first connection; 32-a second connection; 33-an elastic part; 331 a-a first elastic member; 331 b-a second elastic member; 331 c-a third elastic member; 331 d-fourth elastic member; 331 e-fifth elastic member; 331 f-sixth elastic member; 331 g-seventh elastic member; 331 h-eighth elastic member; 331 i-a ninth elastic member; 331 j-tenth elastic member; 332-bending structure; 34-cover plate;

4-a circuit board; 4 a-an outer lead; 4 b-an inner lead; 41-a first electrode; 42-a second electrode; 43-a third electrode; 44-a fourth electrode; 45-a fifth electrode; 46-sixth electrode; 47-seventh electrode; 48-eighth electrode;

5-an outer magnetic conductive frame; 51-an outer frame; 511-positioning the port; 512-a first frame; 513-a second frame; 513 a-a first support plate; 513 b-a second support plate; 513 c-a third support plate; 514-step structure; 515 a-a first connection structure; 515 b-a second connection structure; 52-a support end;

61-a magnetic conductive plate; 62-an inner magnetically permeable frame; 71-balancing weight; 72-buffer structure;

8-a vibration guide plate; 81-insulating sections; 82-conductor segments; 83-connecting segment; 84-an inner ring; 85-a vibration conducting end; 86-clamping structure;

9-an object to be excited; 10-a sound production system; 101-a vibration sounding device; 11-a circuit; 12-feedback coil.

Detailed Description

The present utility model is described below based on examples, but the present utility model is not limited to only these examples. In the following detailed description of the present utility model, certain specific details are set forth in detail. The present utility model will be fully understood by those skilled in the art without the details described herein. Well-known methods, procedures, flows, components and circuits have not been described in detail so as not to obscure the nature of the utility model.

Moreover, those of ordinary skill in the art will appreciate that the drawings are provided herein for illustrative purposes and that the drawings are not necessarily drawn to scale.

Unless the context clearly requires otherwise, the words "comprise," "comprising," and the like in the description are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, as they may be fixed, removable, or integral, for example; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the utility model will be understood by those skilled in the art according to the specific circumstances.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Fig. 1 is an explosion schematic diagram of a vibration sound generating device provided by an embodiment of the present utility model, and a vibration sound generating device 101 includes a coil 1, a magnetic circuit system 2, and two elastic pieces 3. The magnetic circuit system 2 is partially arranged on the inner side of the coil 1, and the two elastic sheets 3 are respectively arranged on two ends of the magnetic circuit system 2 which are not covered by the coil 1. The other side of the spring plate 3 is connected with the object 9 to be excited through the cover plate 34 and the vibration guide plate 8, when the magnetic circuit system 2 moves relative to the coil 1, the spring plate 3 moves along with the movement and excites the object 9 to be excited to generate mechanical vibration, so that the object 9 to be excited vibrates and sounds.

Further, the magnetic circuit system 2 comprises a magnetic structure 21 movably arranged inside the coil 1. In this embodiment, the magnetic structure 21 is a permanent magnet, such as neodymium iron boron material. The permanent magnets generate magnetic force lines in the direction approaching the coil 1 and in the direction separating from the coil 1 respectively. The magnetic circuit system 2 further comprises a magnetically permeable structure 22 surrounding the coil 1 and the magnetic structure 21.

The magnetic conductive structure 22 is composed of a tubular outer magnetic conductive frame 5 arranged outside the coil 1 and magnetic conductive plates 61 arranged at openings at two sides of the outer magnetic conductive frame 5. The magnetic conduction plate 61 is attached to two ends of the magnetic structure 21, which are close to the spring plate 3, and the magnetic conduction plate 61 is used for sealing magnetic force lines extending towards the magnetic conduction plate 61 and away from the coil 1, so that the magnetic field intensity inside the magnetic circuit system 2 is enhanced, and the magnetic field interference suffered by other surrounding devices is reduced. The two magnetic conductive plates 61 and the magnetic structure 21 constitute a central magnetic circuit structure, and the coil 1 on the peripheral side of the central magnetic circuit structure generates a magnetic field by internal energization. The central magnetic circuit structure moves up and down under the drive of magnetic field acting force. In this embodiment, the magnetic conductive plate 61 is made of SPCC material (Steel Plate Cold Common, cold rolled carbon steel sheet and steel strip), and the magnetic conductive plate 61 and the magnetic conductive structure 22 are bonded by glue to form a central portion of the magnetic circuit system 2. The outer magnetic conductive frame 5 is used for sealing magnetic force lines extending towards the outer magnetic conductive frame 5 and away from the coil 1, so that magnetic flux concentrated on the coil 1 is maximized and a uniform magnetic field is provided for the coil 1. In this embodiment, the outer magnetic conductive frame 5 is a hollow prism, and the included angle between each side surface of the prism is a round angle. The magnetically permeable plate 61 and the magnetic structure 21 are cubes with rounded sides. A magnetic gap for accommodating the magnetic structure 21 is formed between the outer magnetic conductive frame 5 and the magnetic conductive plate 61. Since the magnetic gap area is more uniform and the magnetic field force generated is more stable as the gap is closer to the circular shape, in some embodiments the outer magnetically permeable frame 5 is a cylindrical structure and the magnetically permeable plate 61 and the magnetic structure 21 are cylinders of different thickness.

As shown in fig. 1, the magnetic conductive plate 61 is provided with a support portion 23 protruding toward the spring plate 3, and the spring plate 3 has a first connection portion 31 abutting against the support portion 23. The support portion 23 is a hollow structure matching the shape of the first connection portion 31, thereby reducing the weight of the magnetic conductive plate 61 while increasing the contact area with the first connection portion 31. In this embodiment, the supporting portion 23 and the first connecting portion 31 are rectangular rings with rounded corners, and the first connecting portion 31 is glued or welded with the supporting portion 23. The elastic sheet 3 and the central magnetic circuit structure are connected to form a vibration system, the central magnetic circuit structure generates a movement trend in a magnetic field provided by the coil 1, and the elastic sheet 3 assists the central magnetic circuit structure to move up and down through self elasticity. The supporting portion 23 increases the distance between the spring plate 3 and the central magnetic circuit structure, that is, the distance between the spring plate 3 and the magnetic structure 21 attached to the magnetic conductive plate 61 increases, so that the deformation space and displacement distance of the spring plate 3 are increased. Fig. 2 is a schematic diagram of displacement of a spring plate in a working state of a sound generating system according to an embodiment of the present utility model, where a shadow is a deformation displacement of the spring plate 3 when the vibration system moves to a side close to an object 9 to be excited (the spring plate 3 includes an asymmetrically arranged hollow structure, and a hollow portion cannot be cut in the cross-sectional view, so that the shadow is discontinuous in the figure). As shown in fig. 2, the central magnetic circuit structure approaches to the object 9 to be excited, the elastic sheet 3 deforms and controls the vibration amplitude of the central magnetic circuit structure, so that the central magnetic circuit structure cannot collide with and be damaged by the sound of the object 9 to be excited while the whole device sounds.

Fig. 3 is a schematic perspective view of a sound generating system according to an embodiment of the present utility model, where the elastic sheet 3 includes a first connecting portion 31 abutting against the supporting portion 23, a second connecting portion 32 sleeved outside the first connecting portion 31, and an elastic portion 33 disposed between the first connecting portion 31 and the second connecting portion 32. In the present embodiment, the first connection portion 31 and the second connection portion 32 are concentrically arranged structures having the same shape, specifically, the first connection portion 31 and the second connection portion 32 are each hollow rectangles having rounded corners. In some embodiments, the first connection portion 31 and the second connection portion 32 are different shapes, for example, the first connection portion 31 is a solid rectangle, and the second connection portion 32 is a circular ring.

Further, the elastic portion 33 is an asymmetrically disposed hollow structure, and the elastic portion 33 includes a plurality of elastic members 331 respectively connected to the first connecting portion 31 and the second connecting portion 32. In this embodiment, each of the elastic members 331a,331b,331c,331d,331e,331f,331g,331h,331i,331j has at least one bending structure 332, so as to have better mechanical properties to improve the vibration mode of the central magnetic circuit structure. The elastic member 331 in the elastic portion 33 has an asymmetric or non-uniform width structure, thereby effectively separating the eigenmodes of vibration in the low frequency band of the whole vibration sound device 101 and avoiding strong resonance due to degeneracy of the modes. Further, due to the asymmetric structure of the elastic portion 33, the vibration amplitude of each mode in the middle-high frequency band can be effectively suppressed, the fluctuation on the sound pressure frequency response curve due to the anti-phase vibration is reduced, and a flatter sound pressure frequency response and high frequency bandwidth are obtained.

Fig. 4 is a top view of a spring plate according to a first embodiment of the present utility model, where the spring plate 3 has three different elastic members with asymmetric cross-sectional areas all of the three elastic members being equal. The first elastic member 331a has three bending structures 332, and bending directions of adjacent bending structures 332 are opposite. The first elastic member 331a extends obliquely from the middle portion toward the first connecting portion 31 and the second connecting portion 32, respectively, and is bent in opposite directions, and one side near the second connecting portion 32 is connected to the second connecting portion 32 after being bent, and one side near the first connecting portion 31 is bent in opposite directions to the first bending direction after being bent, and is connected to the first connecting portion 31. The first side connection point, the second side connection point and the midpoint are approximately collinear. The middle part of the second elastic member 331b is parallel to the adjacent side of the first connecting portion 31 and the adjacent side of the second connecting portion 32, and two ends of the middle part are bent toward the first connecting portion 31 and the second connecting portion 32 in opposite directions. The bending structure 332 facing the first connecting portion 31 is curved, the bending structure 332 facing the second connecting portion 32 is curved, and the curved angle is acute, i.e. the bending structure 332 has a rotation angle greater than 90 ° relative to the middle portion. The middle part of the third elastic piece 331c is an arc, the chord of the arc is approximately parallel to the adjacent edge of the first connecting portion 31 and the adjacent edge of the second connecting portion 32, and two bending structures 332 with opposite bending directions are respectively arranged at two ends of the middle part. The bending angle of the bending structure 332 towards the second connecting portion 32 with respect to the middle portion is acute, and the end portion of the bending structure 332 is connected at the rounded corner of the second connecting portion 32. The bending structure 332 facing the first connecting portion 31 has a bending of more than 90 ° with respect to the middle, followed by bending in the opposite direction, and the final end portion is perpendicular to and connected to the adjacent side of the first connecting portion 31. The first, second and third elastic members 331a, 331b and 331c are connected at both ends thereof to the three sides adjacent to the first and second connection portions 31 and 32, respectively.

Fig. 5 is a top view of a spring plate according to a second embodiment of the present utility model, where the elastic portion 33 of the spring plate 3 according to the second embodiment of the present utility model has three different elastic members, and the cross-sectional area of the three elastic members gradually decreases from one side near the second connecting portion 32 to a position near the first connecting portion 31. The fourth elastic member 331d is identical in distribution to the bending structure 332 of the first elastic member 331a, and only partially differs in cross-sectional area. The fifth elastic member 331e is approximately the same shape as the second elastic member 331b, and only partially differs in cross-sectional area. The sixth elastic member 331f and the third elastic member 331c correspond to each other, and only partial cross-sectional areas are different. In some embodiments, the cross-sectional area of the elastic member increases gradually from the side near the second connecting portion 32 to the side near the first connecting portion 31, or the cross-sectional area at the middle of the elastic member is larger or smaller than the cross-sectional area at the end of the elastic member.

Fig. 6 is a top view of a spring plate according to a third embodiment of the present utility model, where the elastic portion 33 has four different elastic members, and the cross-sectional area of the four elastic members gradually decreases from one side near the second connecting portion 32 to a position near the first connecting portion 31. The seventh elastic element 331g has four bending structures 332, and adjacent bending structures 332 have opposite bending directions. The seventh elastic member 331g gradually decreases in cross-sectional area as the distance from the first connecting portion 31 decreases. The eighth elastic member 331h has three bending structures 332, and the bending directions of the adjacent bending structures 332 are opposite. One end of the eighth elastic member 331h is connected at a rounded corner of the first connecting portion 31, and the cross-sectional width of the eighth elastic member 331h increases as the distance from the connecting point increases. The ninth elastic member 331i has the same structure as the fifth elastic member 331e, and the tenth elastic member 331j has the same structure as the sixth elastic member 331 f.

In this embodiment, the vibration and sound device 101 has two shrapnel 3, and the two shrapnels 3 may have the same pattern or different patterns, for example, the shrapnel 3 on the side close to the object to be excited 9 is the shrapnel 3 of the first embodiment, and the shrapnel 3 on the side far from the object to be excited 9 is the shrapnel 3 of the second embodiment. The two shrapnel 3 have different shapes, so that the two shrapnels can have different resonance frequencies, thereby adjusting the mode of the whole vibration sound generating device 101, reducing the mode degeneracy caused by a symmetrical structure, and avoiding the concentration of resonance modes and the aggravation of resonance. When the system needs better stability, the elastic pieces with different cross section widths are preferably used, so that the stability of the vibration system can be effectively improved, and the degeneracy of resonance modes is reduced. When the elastic sheet 3 having a different pattern/structure is employed, unstable modes of vibration (generally expressed as sloshing/swaying/rolling vibration) can be suppressed. The elastic members 331 in the same elastic sheet 3 may have different positions and sizes of the bending structures 332, and may have the same or different cross-sectional areas and cross-sectional area variation trends.

Further, the elastic sheet 3 is made of a composite material, has an internal damping characteristic, can effectively inhibit the vibration amplitude near the resonance point, and can effectively expand the sound production band width near the final resonance point of the object 9 to be excited driven by the vibration sound production device 101. In addition, when the integral structure is impacted by the outside (falling impact), the elastic sheet 3 made of the composite material can more effectively absorb and inhibit the vibration amplitude generated by the impact, and the stress damage risk of the structure is reduced.

In this embodiment, the elastic sheet 3 is made of a metal material and a polymer material that are stacked on each other, and the outermost layers on both sides of the elastic sheet 3 are made of metal materials, so that the overall structure has better damping characteristics. The metal material can be stainless steel, copper sheet or other metals, and the polymer material can be epoxy resin, plastic, polyurethane resin, silicone rubber and other materials, and the layer number and each layer thickness of the shrapnel 3 can be adjusted according to the specific requirements of the vibration sound generating device 101. Specifically, the shrapnel 3 is a sandwich type sandwich composite material made of a layer of polymer material arranged between two layers of metal materials. The metal materials on both sides were SUS304 stainless steel with a thickness of 30 μm, and the intermediate layer was a glue layer made of epoxy resin with a thickness of 40. Mu.m. The middle adhesive layer enables the whole structure to have larger internal damping, and can effectively reduce the resonance Q value (namely the quality factor, the lower the Q value is, the faster the energy loss rate of the vibrator is, and the shorter the vibration duration is). The middle adhesive layer absorbs stress generated when the elastic sheet 3 is bent and deformed, so that the fatigue resistance of the material is improved, and the service life of the vibration sound generating device 101 is prolonged. When the elastic sheet 3 is manufactured, the epoxy resin of the middle layer is coated on the coil stock of the stainless steel of the bottom layer, the stainless steel material belt of the upper layer is unfolded and then is adhered with the epoxy resin of the middle layer, and the 3 layers of materials are compounded through a group of rollers with gaps of 100 mu m and then enter the subsequent material punching link.

In some embodiments, the dome 3 is made of a blended composite material, such as an epoxy-reinforced glass fiber board, an epoxy-reinforced carbon fiber board. The spring plate 3 may also be made of a polymer plastic, such as ABS (Acrylonitrile butadiene Styrene copolymers, acrylonitrile-butadiene-styrene copolymer), PET (Polyethylene Glycol Terephthalate, polyethylene terephthalate), PEEK (Poly (Ether-Ketone), polyetheretherketone), PE (Polyethylene), PC (Polycarbonate), POM (polyoxymethylene), PBT (polybutylene terephthalate ), PPA (Polyphthalamide), polyphthalamide, LCP (Liquid Crystal Polymer ), PU (Polyurethane), silicone rubber, and the like.

The vibration sounding apparatus 101 further includes a cover plate 34 connected to the outer magnetic conductive frame 5 and the elastic sheet 3, where the cover plate 34 is a hollow ring structure, the outer shape of the cover plate is matched with the magnetic conductive frame 5, and the inner shape of the cover plate is matched with the second connecting portion 32. Fig. 7 is a cross-sectional view of the vibration sounding apparatus provided by the embodiment of the present utility model, as shown in the drawing, the elastic sheet 3 is located at one side of the outer magnetic conductive frame 5 close to the coil 1, the inner side of the cover plate 34 is connected with the second connection portion 32 of the elastic sheet 3, and the edge of the cover plate 34 is connected with the outer magnetic conductive frame 5. Because the end of the outer magnetic frame 5 is closer to the object 9 to be excited, in order to ensure that the elastic sheet 3 has a larger vibration space, the cover plate 34 comprises a boss protruding towards the inside of the elastic sheet 3, and the boss is matched with the shape of the second connecting part 32, so that the elastic sheet 3 can be tightly connected with the cover plate 34 and arranged at a position close to the inner side of the outer magnetic frame 5. In the present embodiment, the cover plate 34 is bonded to the outer magnetically permeable frame 5 by means of an adhesive, laser welding or partial welding. The cover plate 34 is connected to the second connecting portion 32 by means of an adhesive.

The cover 34 is made of metal or polymer plastic, specifically, stainless steel, copper alloy, PBT (polybutylene terephthalate ), PPA (Polyphthalamide), LCP (Liquid Crystal Polymer ), and the like. In some embodiments, the cover plate 34 is integrally injection-molded with the spring plate 3, which effectively reduces the number of components, simplifies the assembly process, and can increase the strength of the structure.

In the present embodiment, the vibration sound generating device 101 includes two coils 1 and two wiring boards 4 provided in one-to-one correspondence with the coils 1. As shown in fig. 7, two coils 1 are arranged in a vibration sounding device 101 at intervals, one side of each coil 1 is attached to an outer magnetic conductive frame 5, and a vibration system is arranged in each coil 1. The extraction electrodes of the two coils 1 are mutually independent and welded on the corresponding circuit boards 4 respectively, so that the independent control of the two coils 1 is realized, and the control of the vibration sounding device 101 is more flexible. In addition, the arrangement of the circuit board 4 reduces the risk that the lead-out section of the coil 1 is exposed to open circuit caused by easy corrosion or impact fracture, and improves the reliability of the device.

Fig. 8 is a cross-sectional view of an outer magnetic conductive frame provided with coils according to an embodiment of the present utility model, and the outer magnetic conductive frame 5 includes an outer frame 51 wrapping the outer sides of the coils 1 and a supporting end 52 protruding between the two coils 1. The outer frame 51 and the supporting end 52 are manufactured by an overshoot process, and the distance from the end of the outer frame 51 to the supporting surface of the supporting end 52 is equal to the height of the coil 1. The coil 1 is bonded to the outer frame 51 and/or the support ends 52 using glue. When the coil moves, the outer magnetic conductive frame 5 limits the coil 1 through the adhesive force, and the supporting end 52 prevents the upper coil 1 from moving downwards and the lower coil 1 from moving upwards through the structure of the outer magnetic conductive frame, so that the coil 1 is limited. The support ends 52 may be structurally regarded as transverse ribs, thereby effectively enhancing the strength of the outer frame 51. Thus, in the case where the strength of the outer magnetically conductive frame 5 is not changed, the thickness of the outer frame 51 can be thinned, thereby effectively increasing the window area where the coils 1 are arranged (the effective accommodation area of the coils 1) to increase the number of turns of the coils 1. Taking a 50 μm diameter copper wire coil 1 as an example, an instantaneous current of 0.5A can safely flow. In the case of an originally designed magnetic gap of 0.3mm (i.e. 300 μm), the coil 1 can only be provided with 4 layers (0.2 mm/50 μm=4 layers) since a safety gap of 0.1mm needs to be reserved. And when the metal of the outer frame 51 is provided with an indentation of 0.1mm, a flat cable of 0.1mm/0.05 mm=2 layers can be added, so that the total length of the coil 1 is increased by 50%. So that the driving force of the coil 1 to the magnetic structure 21 is raised due to the increase of the length L of the coil 1 while still guaranteeing a driving current of 0.5A (according to f=b×il, F is ampere force, B represents magnetic induction intensity, I represents current intensity through the straight wire, L represents the length of the straight wire in the magnetic field). Also, the longer coil 1 increases the electro-force conversion efficiency (proportional to the length value of the coil 1) of the vibration sound generating device 101, increasing the vibration output of the vibration sound generating device 101.

Further, the support ends 52 have a gap to reduce the overall weight of the outer magnetically permeable frame 5 while achieving a supporting effect. Fig. 9 is a top view of the outer magnetic conductive frame according to the embodiment of the present utility model, wherein the upper coil 1 in fig. 9 is removed, and only the lower coil 1 disposed below the support end 52 remains. As shown, the support ends 52 are provided only on opposite sides of the coil 1, and a gap is provided in the middle of each side of the support ends 52. And, the length S of the supporting end 52 is equal to or less than the thickness W of the coil 1, thereby further reducing the weight of the outer magnetically permeable frame 5 while ensuring the supporting effect.

As shown in fig. 1, the outer frame 51 is provided with a positioning opening 511 for positioning the circuit board 4, and the end of the circuit board 4 extends out of the positioning opening 511 and is connected with other devices. In the present embodiment, the wiring board 4 is disposed between the support end 52 and the coil 1, and the positioning opening 511 is disposed near the support end 52, so that the end of the wiring board 4 protrudes from the positioning opening 511.

Further, the outer magnetic conductive frame 5 is formed by the through combination of the first outer magnetic conductive frame and the second outer magnetic conductive frame, and the end part of the magnetic conductive frame is provided with a supporting end 52 or supports the circuit board 4 by means of the structure of the magnetic conductive frame. During processing, the coil 1 on the lower side is adhered to the side wall of the second outer magnetic conduction frame, the circuit board 4 electrically connected with the lower coil 1 is arranged at the end part of the second outer magnetic conduction frame, the first outer magnetic conduction frame and the coil 1 on the upper side are subjected to the same operation, and finally two sides of the two outer magnetic conduction frames, provided with the circuit board 4, are relatively adhered to each other, so that the outer magnetic conduction frame 5 is formed by combination.

In the present embodiment, the outer magnetically permeable frame 5 is composed of a first frame 512 and a second frame 513. Fig. 10 is a schematic perspective view of a first frame according to an embodiment of the present utility model, where a step structure 514 for forming the positioning opening 511 is formed at an end of the first frame 512. In this embodiment, the step structures 514 are symmetrically disposed on both sides of the first frame 512, so that both sides can form the positioning openings 511 to fix the circuit board 4. The opposite side of the step structure 514 is provided with a first connection structure 515a, and the first connection structure 515a includes a first protruding portion and a first recessed portion, which are disposed side by side at an end of the first frame 512. Fig. 11 is a schematic perspective view of a second frame according to an embodiment of the present utility model, and the second frame 513 includes a first support plate 513a, a second support plate 513b, and a third support plate 513c connected in sequence. The first support plate 513a and the third support plate 513c have the same structure, and each of one end is provided with a second connection structure 515b having a shape matching that of the first connection structure 515a, and the other end is connected to one end of the second support plate 513 b. The first support plate 513a is vertically connected to the second support plate 513b, the third support plate 513c, and the second support plate 513 b. The second connection structure 515b has a second concave portion corresponding to the first convex portion of the first support plate 513a and a second convex portion corresponding to the first concave portion, and the second convex portion is disposed at the end portions of the first support plate 513a and the third support plate 513 side by side corresponding to the second concave portion. When the first frame 512 and the second frame 513 are connected by the first connection structure 515a and the second connection structure 515b, they constitute the outer magnetically permeable frame 5. In this embodiment, the first connection structure 515a and the second connection structure 515b are bonded by an adhesive, laser welding, or a combination of both bonding techniques. Fig. 12 is a top view of the outer magnetic conductive frame and the circuit board according to the embodiment of the present utility model, where the end of the circuit board 4 is aligned with the step structure 514. In some embodiments, step structures 514 are provided at both ends of the second support plate 513 b.

Fig. 13 is a top view of a circuit board according to an embodiment of the present utility model, where a single circuit board 4 is provided with four electrodes. The wiring board 4 includes a strip-shaped inner lead-out portion 4b provided between the outer magnetically conductive frames 5 and an outer lead-out portion 4a extending out of the outer magnetically conductive frames 5, the first electrode 41 and the second electrode 42 are provided on the outer lead-out portion 4a, respectively, and the third electrode 43 and the fourth electrode 44 are provided on the inner lead-out portion 4b, respectively. The first electrode 41 and the third electrode 43 are positive electrodes, and the second electrode 42 and the fourth electrode 44 are negative electrodes. The first electrode 41 and the third electrode 43 are electrically connected, and an external positive electrode lead is connected to the first electrode 41 so as to be electrically connected to the positive electrode of the coil 1. The second electrode 42 and the fourth electrode 44 are electrically connected, and an external negative electrode lead is connected to the second electrode 42 so as to be in conduction with the negative electrode of the coil 1. Therefore, the outgoing line of the coil 1 can be led to the outer side of the coil 1 without crossing the coil, the space utilization rate of the coil 1 is improved, and the fatigue broken line caused by concentration of sounding stress of wires in the coil 1 is effectively protected by simplifying the structure of the outgoing electrode of the coil 1. The wiring board 4 is a PCB (Printed Circuit Board ) or an FPC (Flexible Printed Circuit, flexible circuit board). In this embodiment, the coil 1 and the circuit board 4 are bonded by glue, and conduction is achieved by soldering.

Fig. 14 is a top view of a circuit board and a coil provided in an embodiment of the present utility model, an inner lead-out portion 4b of the circuit board 4 has a ring structure matching the shape of the coil 1 and the outer magnetic conductive frame 5, and a feedback coil 12 concentric with the coil 1 is disposed inside the ring structure. The feedback coil 12 monitors the electric signal generated by the induction of the magnetic induction wire when the coil 1 and the magnetic circuit system 2 move relatively, and transmits the electric signal to the circuit 11 so as to perform feedback closed-loop driving control. The inner lead portion 4b is provided with a third electrode 43 and a fourth electrode 44 for connecting the lead terminal of the coil 1 in this order, and is also provided with a seventh electrode 47 and an eighth electrode 48 for connecting the lead terminal of the feedback coil 12. The outer lead portion 4a is provided with a first electrode 41 and a second electrode 42 connected to a third electrode 43 and a fourth electrode 44, respectively, and is also provided with a fifth electrode 45 and a sixth electrode 46 connected to a seventh electrode 47 and an eighth electrode 48, respectively. External leads are connected to the different electrodes respectively to connect the coil 1 and the feedback coil 12. In the present embodiment, the feedback coil 12 is printed directly on the wiring board 4. In some embodiments, the feedback coil 12 is a multi-turn coil that is wound independently and glued to the circuit board 4.

Fig. 15 is a cross-sectional view of a magnetic circuit system according to an embodiment of the present utility model. In this embodiment, the vibration sound generating apparatus 101 includes two magnetic structures 21 disposed in sequence. The magnetic conductive structure 22 further includes an inner magnetic conductive frame 62 that cooperates with the magnetic conductive plate 61 to encase the magnetic structure 21. The opposite sides of the inner magnetic conductive frame 62 are respectively provided with a containing groove for containing the magnetic structures 21, the two coils 1 are respectively sleeved outside the two magnetic structures 21, and the two groups of coils 1 and the magnetic structures 21 are respectively arranged in the two containing grooves. The two magnetic conductive plates 61 are respectively arranged on the surfaces of the magnetic structure 21 which are not wrapped by the coil 1 and the inner magnetic conductive frame 62. The inner magnetic conductive frame 62 and the magnetic conductive plate 61 cooperate to enclose magnetic lines of force of the magnetic structure 21 extending away from the coil 1, so that the magnetic flux concentrated on the coil 1 is maximized.

Further, a weight 71 is provided on the peripheral side of the inner magnetically permeable frame 62, the weight 71 has a convex portion protruding toward the inner magnetically permeable frame 62, and the inner magnetically permeable frame 62 has a groove matching the convex portion. The weight 71 has a density of more than 8g/cm ³ For example, an alloy having a density of 8.9g/cm ³ Copper alloy or density of 16g/cm ³ Is a tungsten alloy of (a) and (b). So that the overall weight is increased with little change in the overall vibration system volume, thereby enabling the vibration sound producing device 101 to have a greater output of vibration recoil force with the same amplitude.

Fig. 16 is a cross-sectional view of a magnetic circuit system according to a second embodiment of the present utility model, where the magnetic circuit system 2 further includes a buffer structure 72. The buffer structure 72 is adhered to the outer magnetic conductive frame 5 by using glue or is directly embedded into the surface of the outer magnetic conductive frame 5 near one side of the balancing weight 71. The buffer structure 72 is a plastic or rubber block with a certain elasticity or buffer capability, so that when the vibration system is impacted transversely when the vibration sound generating device 101 falls, the coil 1 can be effectively prevented from being impacted and rubbed by the magnetic circuit system 2, particularly the balancing weight 71 with higher strength, and the risk of breakage or subsequent corrosion and fracture of the coil 1 is avoided.

Fig. 17 is a cross-sectional view of a magnetic circuit system according to a third embodiment of the present utility model, where the magnetic structure 21 includes two sequentially arranged central magnetic structures 21a and annular magnetic structures 21b respectively sleeved outside the two central magnetic structures 21 a. The outer central magnetic structure 21a and the annular magnetic structure 21b constitute a magnetic gap for accommodating the coil 1. In some embodiments, the annular magnetic structure 21b is a cylindrical structure and the central magnetic structure 21a is a cylinder, thereby having a more uniform and stable magnetic field. The two coils 1 are respectively arranged between the magnetic gaps formed by the central magnetic structure 21a and the annular magnetic structure 21b. In addition, in this embodiment, the total volume of the magnetic structure 21 is larger, so that the magnetic induction intensity (B value) in the same magnetic gap can be increased, and the increase of the magnetic induction intensity can also increase the vibration force output of the vibration sound generating device 101, by f=b×il (F is ampere force, B represents the magnetic induction intensity, I represents the current intensity through the straight wire, and L represents the length of the straight wire in the magnetic field).

As shown in fig. 17, in order to ensure that the total volume of the structure inside the outer magnetically permeable frame 5 is constant, the inner magnetically permeable frame 62 is simply a sheet-like structure disposed between the two sets of magnetic structures 21 and the coil 1. The inner magnetic frame 62 encloses magnetic lines of force extending in the opposite direction from the magnetic structures 21 on both sides, so that the magnetic flux concentrated on the coils 1 on the circumferential sides of the magnetic structures 21 is maximized and a uniform magnetic field is provided to the corresponding coils 1.

In some embodiments, the vibration sounding device 101 includes at least two magnetic structures 21 disposed at intervals, the plurality of magnetic structures 21 are arranged in the vibration sounding device 101 along the vibration direction, the plurality of magnetic conductive structures 22 and the coil 1 sequentially surround the magnetic structures 21, and the elastic sheets 3 are disposed in parallel between the adjacent magnetic conductive structures 22. That is, the plurality of spring plates 3 divide the adjacent magnetic conductive structures 22, so that the spring plates 3 are arranged between each group of coils 1 and the magnetic circuit system 2.

The embodiment of the utility model also provides a sound generating system 10, wherein the sound generating system 10 comprises the vibration sound generating device 101 and the vibration conducting plate 8. The vibration conducting plate 8 is connected with the vibration sound generating device 101 and the object 9 to be excited. The object 9 to be excited may be an OLED (organic light-Emitting Diode) display screen, and the vibration-guiding sheet 8 includes an inner ring 84 matching the shape of the cover 34 and a vibration-guiding end 85 circumferentially disposed outside the inner ring 84. Fig. 18 is a top view of a vibration conducting plate according to an embodiment of the present utility model, where the inner ring 84 is a hollow rectangular plate, and the hollow portion can further increase the movement range of the elastic sheet 3, so that the whole vibration system has a larger maximum amplitude when moving toward the object 9 to be excited. The vibration conducting ends 85 are square pieces provided at four corners of the inner ring 84.

In the present embodiment, the thickness of the vibration-guiding plate 8 is 0.02mm to 1mm, which is thinner than the vibration sound generating device 101, thereby reducing the thickness and volume of the entire sound generating system 10. The equivalent elastic modulus of the vibration conducting plate 8 is between 0.1GPa and 200GPa and is lower than that of a hard material used on the surface of the vibration sound generating device 101, so that the vibration conducting plate 8 can achieve better mechanical impedance matching, damage to a display assembly when falling impact is reduced, and proper mechanical damping is provided for improving sound quality.

As shown in fig. 2, the vibration-guiding plate 8 is connected to the vibration-producing device 101 through the inner ring 84, and the inner ring 84 is adhesively connected to the cover 34 through double-sided adhesive, hot melt adhesive, or glue, such as epoxy resin, UV (Ultraviolet) glue. The vibration-guiding sheet 8 is connected to the object 9 to be excited by a vibration-guiding end 85, and the vibration-guiding end 85 is also adhesively connected to the object 9 to be excited by a double-sided adhesive tape, a hot melt adhesive, or glue, such as an epoxy resin UV (Ultraviolet) glue. In some embodiments, a fastening structure exists between the vibration conducting sheet 8 and the vibration sound generating device 101 and/or the object 9 to be excited, and the vibration conducting sheet 8 and the vibration sound generating device 101 and/or the object 9 to be excited are connected through a fastening structure, or are connected through an adhesive fit fastening at the same time.

Fig. 19 is a side view of a sound generating system according to an embodiment of the present utility model, where the vibration-guiding plate 8 is a planar structure, and is adhesively connected to the vibration sound generating device 101 by a double-sided adhesive tape, a hot melt adhesive, or a glue, such as an epoxy UV (Ultraviolet) glue.

Fig. 20 is a side view of a sound generating system according to a second embodiment of the present utility model, where the vibration conducting plate 8 includes a fastening structure 86 protruding toward the vibration sound generating device 101, and the fastening structure 86 is matched with a corresponding fastening groove on the outer wall of the vibration sound generating device 101, so as to connect the vibration conducting plate 8 and the vibration sound generating device 101. And, at this time, an adhesive structure using glue, double faced adhesive tape or hot melt adhesive may be added between the vibration conducting plate 8 and the vibration sound generating device 101, so that two adhesive structures are used to ensure the connection reliability of the two structures.

Fig. 21 is a side view of a sound generating system provided in the third embodiment of the present utility model, where the vibration conducting plate 8 further includes an insulation section 81 and a conductor section 82, and the conductor section 82 is electrically connected to the coil 1 inside the vibration sound generating device 101 and the circuit on the object 9 to be excited, so as to connect the object 9 to be excited and the vibration sound generating device 101, and simplify the feeding and control of the vibration sound generating device 101. The conductor segments 82 may be wires of conductive metal. The vibration conducting plate 8 is made of metal or a composite material of a circuit board and plastic and is made by an in-mold injection molding process, and the insulating section 81 and the conductor section 82 are compounded to form a composite material, so that the transmission of vibration can be regulated, and the vibration mode of the object 9 to be excited can be improved, and the radiated sound can be optimized. The conductor segments 82 are typically disposed in the vibration conducting end 85, and as the volume of the conductor segments 82 increases, the vibration conducting end 85 expands itself to accommodate the conductor segments 82.

In some embodiments, the conductor segment 82 may also be an FPC (Flexible Printed Circuit, flexible circuit board) or a PCB (Printed Circuit Board ). The PCB and FCB have conductive tracks, proper stiffness (mechanical impedance characteristics) and a certain internal damping, which help to improve the vibration coupling of the vibration sound emitting device 101 and the object 9 to be excited, compared to a simple metal sheet.

Fig. 22 is a side view of the sound generating system according to the fourth embodiment of the present utility model, where the conductor segment 82 is further bent from the vibration conducting end 85 to the clamping structure 86, and the end of the clamping structure 86 near the side of the vibration sound generating device 101 extends out of the electrode pad of the conductor segment 82, so that the pad can be connected with the circuit board 4 of the vibration sound generating device 101 by welding, so as to facilitate feeding and providing control signals to the vibration sound generating device 101.

Fig. 23 is a schematic diagram of a sound generating system according to an embodiment of the present utility model, where the sound generating system 10 includes an object to be excited 9, a vibration-guiding sheet 8, and a vibration sound generating device 101 that are sequentially connected, and the sound generating system 10 further includes a circuit 11 connected to the vibration sound generating device 101. The circuit 11 supplies a driving signal (excitation signal) to the vibration sound generating device 101, and the driving signal (excitation signal) is input to the coil 1 in parallel, in series, or in a group independent manner. In addition, the feedback coil 12 induces the magnetic structure 21 to move the electric signal induced by the cutting coil 1 and transmits it to the circuit 11, so that the circuit 11 performs driving control with feedback closed loop. Further, the circuit 11 extracts an electric signal from any one of the coils 1, and obtains the vibration intensity of the vibration sound generating device 101 by processing the electric signal, thereby realizing closed-loop control.

Fig. 24 is a schematic diagram of a first application of the sounding system provided by the embodiment of the present utility model, where the object 9 to be excited is an OLED display screen or a glass housing of a mobile phone, the sounding system 10 is installed on one side of the object 9 to be excited, and the circuit 11 in the sounding system 10 is disposed outside other structures in the sounding system 10 and connected with the other structures through wires.

Fig. 25 is a schematic diagram of a second application of the sound generating system according to the embodiment of the present utility model, where the object 9 to be excited is smart glasses. Specifically, the sound generating system 10 is mounted on the temples of the smart glasses to excite the temples to generate sound.

Further, the application of embodiments of the present utility model provides sound generating system 10, including but not limited to the following categories of sound generation using display screen vibration: mobile phones, tablets, notebook computers, computer monitors, televisions, automobile displays, security system displays; also included, but not limited to, are the following devices that utilize vibration sounding of the device housing: the mobile phone comprises a mobile phone back shell, a mobile phone protection shell, a tablet personal computer back shell, a tablet personal computer protection sleeve, an intelligent sound box back shell, a sound box base and an automobile instrument board; also included, but not limited to, are the following electronic devices that utilize vibration sounding of the device structure: and a bracket of intelligent glasses and a safety helmet.

The utility model provides a vibration sounding device and a sounding system, wherein the vibration sounding device comprises a coil, a magnetic circuit system and two elastic sheets, the magnetic circuit system and the coil are interacted with each other due to a magnetic field generated by a changed current, so that vibration is generated, and the two elastic sheets are respectively arranged at two ends of the magnetic circuit system to control the vibration amplitude of the two elastic sheets. Specifically, the elastic sheet is provided with an asymmetrically arranged hollow structure, so that strong resonance caused by modal degeneracy is effectively avoided in the vibration process, and the low-frequency performance of the vibration sounding device is improved. In addition, the elastic sheet with the asymmetric hollow structure can effectively inhibit the vibration amplitude of each mode, reduce fluctuation on a sound pressure frequency response curve caused by anti-phase vibration, obtain flatter sound pressure frequency response and high frequency bandwidth, and improve the middle-high frequency performance of the vibration sounding device.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A vibration sound emitting device, characterized in that the vibration sound emitting device (101) comprises:

a coil (1) provided inside the vibration sound generating device (101);

the magnetic circuit system (2) comprises a magnetic structure (21) arranged on the inner side of the coil (1) and a magnetic conduction structure (22) wrapping the coil (1) and the magnetic structure (21), wherein two sides, close to an opening of the coil (1), of the magnetic conduction structure (22) are provided with supporting parts (23);

the two elastic pieces (3) are respectively arranged at two ends of the opening of the coil (1), each elastic piece (3) comprises a first connecting portion (31) which is in butt joint with the supporting portion (23), a second connecting portion (32) which is sleeved on the outer side of the first connecting portion (31), and an elastic portion (33) which is arranged between the first connecting portion (31) and the second connecting portion (32), and the elastic portion (33) is of an asymmetrically arranged hollow structure.

2. The vibration-sound-producing device according to claim 1, wherein the elastic portion (33) includes a plurality of elastic members (331 a,331b,331c,331d,331e,331f,331g,331h,331i,331 j) respectively connecting the first connecting portion (31) and the second connecting portion (32), the elastic members (331 a,331b,331c,331d,331e,331f,331g,331h,331i,331 j) having at least one bending structure (332).

3. The vibration-sound-producing device according to claim 2, wherein the cross-sectional areas of the first section of the elastic member (331 a,331b,331c,331d,331e,331f,331g,331h,331i,331 j) connected to the first connecting portion (31) and the second section connected to the second connecting portion (32) are not equal.

4. The vibration and sound device according to claim 1, wherein the shrapnel (3) comprises at least two layers of metal materials and at least one layer of polymer material, and the outermost layers of the shrapnel (3) are all the metal materials.

5. The vibration sound emitting device according to claim 1, characterized in that the vibration sound emitting device (101) comprises:

the two coils (1) are arranged at intervals, and the extraction electrodes of the two coils (1) are mutually independent;

the two circuit boards (4) are respectively arranged between the two coils (1), and the two circuit boards (4) are connected with the extraction electrodes of the two coils (1) in a one-to-one correspondence manner.

6. The vibration and sound device according to claim 5, wherein the magnetic conductive structure (22) further comprises a cylindrical outer magnetic conductive frame (5) surrounding the outer side of the coil (1), the outer magnetic conductive frame (5) comprises an outer frame (51) wrapping the outer side of the coil (1) and a supporting end (52) protruding between the two coils (1), the outer frame (51) is provided with a positioning opening (511) for positioning the circuit board (4), and the positioning opening (511) is arranged on one side of the outer frame (51) close to the supporting end (52).

7. The vibration and sound device according to claim 6, characterized in that the outer frame (51) comprises a first frame (512) and a second frame (513), the first frame (512) and/or the second frame (513) being provided with a step structure (514) constituting the positioning opening (511) near the supporting end (52), the first frame (512) and the second frame (513) being connected by means of mutually cooperating connecting structures.

8. The vibration and sound device according to claim 1, characterized in that the magnetic conductive structure (22) comprises an inner magnetic conductive frame (62) and a magnetic conductive plate (61), the magnetic conductive plate (61) is matched with the inner magnetic conductive frame (62) to wrap the magnetic structure (21) and the coil (1), and at least one balancing weight (71) is arranged on one side of the inner magnetic conductive frame (62) away from the coil (1).

9. The vibration and sound device according to claim 8, characterized in that the vibration and sound device (101) further comprises a buffer structure (72) arranged at one side of the weight (71).

10. A sound emitting system, characterized in that the sound emitting system (10) comprises:

the vibratory sound device (101) of any of claims 1-9;

and the vibration conducting sheet (8) is respectively connected with the vibration sounding device (101) and the object to be excited (9).